A method and apparatus comprising an array of piezoelectric elements, a flexible substrate connected to the array of piezoelectric elements, and an organic circuit system formed on the flexible substrate and connected to the array of piezoelectric elements. The flexible substrate is configured to substantially conform to a surface of a test object. The organic circuit system is configured to cause the array of piezoelectric elements to send sound signals into the test object.
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August 17, 2012
December 6, 2016
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